The amount of blood after taking birth control pills is particularly large is usually abnormal, it is recommended to seek medical attention. There may be a small amount of bleeding after taking birth control pills, because birth control pills contain sex hormones, hormonal fluctuations in the body after taking them, resulting in endometrial withdrawal bleeding, which is a normal phenomenon. However, the amount of bleeding is not normal, and you need to be especially vigilant at this time. After taking birth control pills, the amount of blood is particularly large may be related to the excessive dose of drugs, drug side effects and the existence of gynecological diseases and other factors, the specific reasons need to go to the hospital for further examination to determine, it is recommended to deal with in a timely manner, otherwise it will have a serious impact on the body. Contraceptive pills should be taken under the guidance of a doctor and should not be abused. For women who experience abnormalities after taking the pill, it is recommended that they seek medical attention promptly.